Across
- 4. An atom that carries an electrical charge.
- 7. what type of charge does an electron have?
- 8. The mass per unit volume.
- 9. The force exerted per unit area of a force.
- 10. How many valence electrons does Fluorine have?
Down
- 1. A substances reaction with another to form a new substance with different properties.
- 2. Who made the periodic table?
- 3. what is Number 9 on the periodic table?
- 5. What type of charge does a proton have?
- 6. property A characteristic of a substance that can be observed without changing the composition of a substance.